DOI: http://dx.doi.org/10.5069/G9K935FB
OT Collection ID: OT.012013.26911.1
Dataset Name: Pahrump  Valley: California/Nevada State Line
Short Name: CA05_Wernicke
Collection Platform: Airborne LiDAR

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Dataset Overview: NCALM. PI: Brian Wernicke, Caltech and Bernard Guest, University of Calgary. The survey area consisted of three 500 meter wide corridors near the California-Nevada border and across the Pahrump Valley. The corridors total approximately 60 km long, 0.5 to 1 km wide and contained approximately 40 square km. Please note that the flight was conducted in an unconventional way as this was an add-on to other work and was done to quickly obtain data for the requested area. Rather than flying a regular, straight grid across the area, the airplane banked along the determined trajectory. This way of gathering data introduces noticeable error, especially on the fringes of the flight path, giving a "corduroy" appearance to the data. This is in addition to the background periodic fine scale elevation variation (normally 5 to 20cm) which is a property of the Optech LIDAR system, and within the machine's error limits. This effect is less noticeable in Corridor 1 as the plane was following a mostly straight trajectory. Our understanding is that if these preliminary data looked promising, a carefully planned survey would then be conducted if funding became available. Bare-earth extraction was not performed on this dataset due to the scarceness of vegetation in the interest area. Filtering the data with a conservative feature preserving algorithm (Hagerud) can remove some of the vegetation but with the expense of smoothing out some of the morphology in steep areas.

Dataset Acknowledgement: LiDAR data acquisition and processing completed by the National Center for Airborne Laser Mapping (NCALM - http://www.ncalm.org). NCALM funding provided by NSF's Division of Earth Sciences, Instrumentation and Facilities Program. EAR-1043051. http://dx.doi.org/10.5069/G9K935FB

Dataset Keywords: 

Survey Date: 02/08/2005

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Data Provider and Roles:
	1. National Center for Airborne Laser Mapping
	Role: Collector
	Url: http://www.ncalm.cive.uh.edu/

	2. National Science Foundation
	Role: Funder
	Url: http://nsf.gov/


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Total LiDAR Points: 49,069,165 pts

Area: 48.0 km^2

Shot Density: 1.02 pts/m^2

Coordinates System: 
	Horizontal: UTM z11 N NAD83 (CORS96) [EPSG: 26911]
	Vertical: NAVD88 (Geoid 03) [EPSG: 5703]

Survey Report: http://opentopo.sdsc.edu/metadata/NCALM/CA05_Wernicke.zip

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Download and Access Products: 
	1. Point Cloud Data
		opentopoID: OTLAS.012013.26911.1
		Download and Processing: http://opentopo.sdsc.edu/gridsphere/gridsphere?cid=geonlidarframeportlet&gs_action=lidarDataset&opentopoID=OTLAS.012013.26911.1


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Dataset Extent in KMZ format: http://opentopo.sdsc.edu/lidarkmls/point_cloud/CA05_Wenicke_bounds.kmz

Dataset Spatial Bounds:
	North: 36.3084°
	South: 36.0780°
	East: -115.8050°
	West: -116.1956°